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黎默黎默

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[交流] 过渡态中的例子疑问

我想请问下这个例子是啥意思,为啥用两种方法,是做的link?为啥我重复不出来它的结果,特别是△G的数据









Supporting Information: “Imine” This is the lowest energy gas phase structure. Used to calculate gas phase
barrier.
------------------------------------------------------------------------------
Using Gaussian 03: AM64L-G03RevE.01 11-Sep-2007
=====================================================================
# opt=maxcycle=250 freq=noraman b3lyp/6-31g(d) geom=connectivity gfprint
gfinput scf=(direct,tight,maxcycle=300,xqc)
#N Geom=AllCheck Guess=Read SCRF=Check GenChk RB3LYP/6-31G(d) Freq
------------------------------------------------------------------------------
Pointgroup= C1 Stoichiometry= C10H13N C1[X(C10H13N)] #Atoms= 24
Charge = 0  Multiplicity = 1
------------------------------------------------------------------------------
SCF Energy= -443.629723627  Predicted Change= -6.497693D-09
==================================================================
Optimization completed. {Found 2 times}
Item Max Val. Criteria Pass? RMS Val. Criteria Pass?
Force 0.00001 || 0.00045 [ YES ] 0.00000 || 0.00030 [ YES ]
Displ 0.00033 || 0.00180 [ YES ] 0.00033 || 0.00180 [ YES ]
------------------------------------------------------------------------------
Atomic  Coordinates (Angstroms)
Type  X  Y  Z
------------------------------------------------------------------------------
C 2.104482 -1.389191 0.731569
H 2.238364 -2.291418 1.322952
C 0.848158 -0.787604 0.661784
H 0.008350 -1.224265 1.196984
C 0.650460 0.376382 -0.095137
C -0.721370 1.046110 -0.145888
C -1.081429 1.735768 1.179296
H -0.320374 2.480029 1.435893
H -1.144041 1.009100 1.994235
H -2.054249 2.230677 1.105170
C -1.769842 0.049095 -0.596295
H -1.576132 -0.419558 -1.577785
Supporting Information  S18
H -0.671694 1.813718 -0.933881
C 1.742013 0.917135 -0.784897
H 1.605180 1.818254 -1.379255
C 3.001709 0.318536 -0.716865
H 3.836668 0.755077 -1.259022
C 3.186752 -0.837365 0.042252
H 4.165717 -1.306268 0.095325
N -2.790712 -0.244325 0.097602
C -3.724333 -1.217104 -0.441445
H -3.820214 -2.052753 0.262347
H -4.716083 -0.756135 -0.524027
H -3.436108 -1.616767 -1.428392
------------------------------------------------------------------------------
Statistical Thermodynamic Analysis
Temperature= 298.150 Kelvin Pressure= 1.00000 Atm
==========================================================
SCF Energy= -443.629723627 Predicted Change= -6.497693D-09
Zero-point correction (ZPE)=  -443.4225  0.20717
Internal Energy (U)=  -443.4117  0.21799
Enthalpy (H)=  -443.4107  0.21893
Gibbs Free Energy (G)= -443.4597  0.16996
------------------------------------------------------------------------------
Frequencies -- 35.7614 56.2056 112.3324
∆G SCS-MP2 CBS = -443.449538958
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